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Main : Mechanical : Fuel Injection CA18DET Modified EFI Manifold

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CA18DET Modified EFI Manifold
CA18DET Modified EFI ManifoldPopular
SubmittermatbighatMore Photos from matbighat   Last Update2003/6/29 6:46    Tell a friendTell a friend
Hits5044  Comments7    0.00 (0 votes)0.00 (0 votes)
Hmm, what's the point in moving the injectors?

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Poster Thread
L18_B110
Posted: 2003/7/1 7:30  Updated: 2003/7/1 7:30
No life (a.k.a. DattoMaster)
Joined: 2002/8/6
From: Brisbane, Australia
Posts: 3792
 Re: CA18DET Modified EFI Manifold
factory injector placement is designed primarily for emissions and fuel economy. Moving them further away from the port can improve power by wetting the manifold walls and cooling the manifold and inlet charge. that's the theory at least.

Poster Thread
2332owner
Posted: 2003/7/1 8:19  Updated: 2003/7/1 8:19
No life (a.k.a. DattoMaster)
Joined: 2003/5/5
From: Okinawa, Japan
Posts: 1292
 Re: CA18DET Modified EFI Manifold
These are also top feed. If CA are the same as SR (I know they're not the same but if they're the same type) they're originally side feed.

Poster Thread
dattodude
Posted: 2003/7/1 13:00  Updated: 2003/7/1 13:00
No life (a.k.a. DattoMaster)
Joined: 1998/12/6
From: Sydney, Australia
Posts: 5806
 Re: CA18DET Modified EFI Manifold
No..CA18DE/Ts are top feed.

You get the best fuel burn if the injectors
are pointing straight at the intake valves.

Although the wetting/cooling theory probably has some merit (I can't refute it anyway)


Chris

Poster Thread
matbighat
Posted: 2003/8/4 2:07  Updated: 2003/8/4 2:07
No life (a.k.a. DattoMaster)
Joined: 2001/1/30
From: California
Posts: 2973
 Re: CA18DET Modified EFI Manifold
My guess is that this custom setup mimics the Greddy SR20DET manifolds that allow 2 injectors per cylinder for high horsepower engines.

Poster Thread
no
Posted: 2003/8/4 8:10  Updated: 2003/8/4 8:10
Home away from home
Joined: 2002/11/10
From: NorCalifornia, up by Sac
Posts: 332
 Re: CA18DET Modified EFI Manifold
What if a car's A/C (or similar effect) cooled a H2O jacketed intake maifold. I'm not familar with injectors and such, but people keep talking about "colder air = power".

Poster Thread
flyby
Posted: 2003/8/4 12:17  Updated: 2003/8/4 12:17
Home away from home
Joined: 2002/3/22
From: Western Sydney
Posts: 362
 Re: CA18DET Modified EFI Manifold
There are drag cars that run on a similar theory, except using dry ice as it doesn't rob any engine power...

Rotomaster have spent alot on this theory i beleive??

Poster Thread
matbighat
Posted: 2007/6/14 17:54  Updated: 2007/6/14 17:54
No life (a.k.a. DattoMaster)
Joined: 2001/1/30
From: California
Posts: 2973
 Re: CA18DET Modified EFI Manifold
finally figured out what's going on: on seriously high horsepower ca18det (or sr20det, etc.) the original injectors are retained for driveability and the secondary injectors are for higher rpms and fuel delivery